linux-kernel - [PATCH 04/26] sysfs: sysfs_remove_dir stop checking for bogus cases.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1243628376-22905-4-git-send-email-ebiederm@xmission.com>
Date:	Fri, 29 May 2009 13:19:14 -0700
From:	"Eric W. Biederman" <ebiederm@...ssion.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	<linux-kernel@...r.kernel.org>, Tejun Heo <tj@...nel.org>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	<linux-fsdevel@...r.kernel.org>,
	Kay Sievers <kay.sievers@...y.org>, Greg KH <greg@...ah.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"Eric W. Biederman" <ebiederm@...stanetworks.com>
Subject: [PATCH 04/26] sysfs: sysfs_remove_dir stop checking for bogus cases.

From: Eric W. Biederman <ebiederm@...ssion.com>

kobj->sd can not be NULL in sysfs_remove_dir.

sysfs_remove_dir is only called from kobject_add (to clean up after failure)
and from kobject_del at the end of a kobject's life.  In both cases kobject_add
has already called sysfs_create_dir successfully.  The only writers of
kobj->sd are sysfs_create_dir on sucess and sysfs_remove_dir when it clears
the kobj just before deleting the directory.

Which means at the time sysfs_remove_dir is called kobj->sd will be
valid.

Signed-off-by: Eric W. Biederman <ebiederm@...stanetworks.com>
---
 fs/sysfs/dir.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index b95cc07..a55e1d4 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -752,9 +752,6 @@ static void __sysfs_remove_dir(struct sysfs_dirent *dir_sd)
 	struct sysfs_addrm_cxt acxt;
 	struct sysfs_dirent **pos;
 
-	if (!dir_sd)
-		return;
-
 	pr_debug("sysfs %s: removing dir\n", dir_sd->s_name);
 	sysfs_addrm_start(&acxt, dir_sd);
 	pos = &dir_sd->s_dir.children;
-- 
1.6.3.1.54.g99dd.dirty

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/